ESP32-based wifi beacon logger.

A lot of what people are doing on rasp pi's is overkill can be accomplished on an ESP32 instead.

Use case:

• Log wifi base stations with key information, on a very small size and power device.
• In this version, findings are read over a serial connection.
• Definitely expandable to add more storage, remote access, and 802.11 research features.

Setup:

• Flash project to ESP32 using platformio on VSCode
• In this version, collection routine executes immediately and passes data off the device using serial
• For testing, use the serial-over-usb and serial monitor in VSCode

Project layout:

• Developed in C++ on platformio in VSCode
• runtime behavior defined in /src/main.cpp

Flow of control:

• main.cpp:
  • setup() and loop() are called from the framework
  • Establishes serial comms
  • Scans for hidden and visible wifi networks, prints a table with SSID, RSSI, and encryption type
  • In this version, all output is live to a serial receiver (115200)

Documentation:

• This readme, and the comments in the /src files

Dependencies:

• platformio, including arduino wifi library

Future:

• local storage of logs with sd card expansion or on EEPROM
• automatic wireless data egress over MQTT, or control/retrieval through a wifi webui (station mode for control, enters monitor mode to scan, gpio button to come back to client mode, webui available again to copy off findings)
• LED status indication